LONDON — The first of Colin Kaepernick’s two rushing touchdowns Sunday had 49ers coach Jim Harbaugh especially impressed after a 42-10 rout of the Jacksonville Jaguars.

That 12-yard touchdown run put the 49ers ahead 14-0, and it came once Kaepernick dove to hit the left pylon ahead of safety Josh Evans.

“He looked much like a running back, and that’s great courage,” Harbaugh said. “You don’t always see that in the quarterback position. As soon as he saw that window, he had great ‘dart’ and speed to get the ball into the end zone.”

Kaepernick also had great blocks from left tackle Joe Staley and running back Frank Gore.

“Frank ended up cutting two guys on the play and gave me the edge,” Kaepernick said. “The offensive line did a great job, made it easy for me.”

The third-year quarterback celebrated in trademark “Kaepernicking” fashion by kissing his right biceps after his second rushing touchdown in two games. That prompted fullback Bruce Miller to “Kaepernick” his own right biceps, too.

“It was a great call. They were doing a lot of stuff inside to take away the inside run,” Staley said. “You get down there (in the red zone), and that’s one of the things about Kaepernick: He’s a weapon with his legs as well.”

Kaepernick wasn’t done making big plays in what evolved into the 49ers’ fifth-straight win.

For the first time since last season’s playoff opener against Green Bay, Kaepernick delivered a second rushing touchdown, doing so on a 9-yard run for a 28-0 lead. It came on a read-option play to the left side on third-and-7, and it made the 49ers 5 of 7 on third-down conversions to that point.

“You have to give credit to Kaepernick and their offense,” Jaguars linebacker Paul Posluszny said. “He scrambled for first downs where normally we would get off the field in those situations.”

Kaepernick had seven carries for 54 yards. In last Sunday’s win at Nashville, he had 11 carries for 68 yards and a touchdown.

If those rushing yards didn’t ease concerns about a lingering foot injury, a clean passing line might. For the second straight game, Kaepernick had no passes intercepted. He was 10 of 16 for 164 yards with one touchdown, no sacks and a 117.7 passer rating, which was his best since the season opener (129.4).

“He’s capable of just about anything, running or passing,” Harbaugh said. “I thought he was seeing the field extremely well.”

Kaepernick had a hand in six plays that each went for at least 17 yards, including long completions to Miller (43 yards), Vernon Davis (31 and 19 yards) and Anquan Boldin (21 and 17 yards).

All in all, Kaepernick emerged feeling great about the 49ers’ recent string of playing “complete games” in their win streak. He certainly didn’t mind that the latest triumph came in his international debut.

“My experience was great,” Kaepernick said. “Got to see the city a little bit. A lot of people here are really nice. I had a great time.”